Viscosimeter



H. C. RULE, JR

VI SCOSIMETER Filed Feb. 2, 1932 R O T N E V N f/onmfio C. EULE J/a. M QM ATTORNEY Patented Nov. 14, 1933 UNITED STATES PATENT OFFICE (Granted under the act of March 3, 1883, as

amended April 30, 1928; 370 0. G. 757) My invention relates broadly to a viscosimeter and more particularly to a viscosimeter of the compound pendulum type.

An object of this invention is to provide a meter of the character described that, is dependable in the ascertainment of the viscosity of fluids.

Another object of this invention is the provision of a device of the character described whereby fluids may be properly classed in accordance with viscosity.

A further object of this invention is to provide a viscosimeter that is efiicient in operation, cheap to manufacture and simple in construction.

With the above and other objects in view, the invention consists in the construction, combination and arrangement of parts as will be described more fully hereinafter.

Reference is to be had to the accompanying drawing forming a part of this specification wherein like reference characters indicate corresponding parts throughout the several views, and in which:

Fig. 1 is a side elevation of the inner face of one of the body sections of the viscosimeter with the pendulum in position;

Fig. 2 is a section on the line AA of Fig. 1 showing the viscosimeter assembled.

Referring more particularly to the drawing, the body member is preferably composed of two sections 5 and 6 secured together by suitable fastening elements, such as the bolts 7, and having interposed between the joined sections a fluid-tight packing 8. Each of the sections is provided on its inner face with a groove 9 so positioned that when the sections are joined, the grooves meet to form a channel in the body member. It will be noted from Fig. 2 that the sections are thicker at their base than elsewhere so that when the sections are joined, a space is provided therebetween for free movement of the rod of the compound pendulum 10. The upper portions of the sections are cared to support the pintle 11 of the pendulum. Adjustable bearings 12 are mounted in the cared portions to promote centralization of the pendulum in the operating space provided therefor as above explained.

A streamline bob 13 is secured to one end of the rod 10 in any desirable manner, the other end of which terminates in a pointer 14 that sweeps over a scale 15 calibrated in any desired unit of measurement, and that is supportedfrom one of the sections before referred to by a bracket 16.

The bob is held in its initial or starting position by a hook-member 1'7 mounted on a shaft 18 and that is operated by a push-pull rod 19 passing the point of arc at which the pendulum stops in its travel before starting its return swing. This point makes a definite angle with the vertical that is indicated on the scale by reference to a zero mark.

In operating the viscosimeter, the channel in which the bob swings is filled with fluid and the releasing gear freed from the bob by pushing in the finger piece 21. When thus freed, the bob will swing until stopped by the resistance of the fluid in the channel. The point at which the bob stops before beginning its return swing is read on the scale, and from this reading the viscosity of the fluid is ascertained. In this manner fluids having difierent viscosity may be properly classed.

It will be understood that the above descrip-' tion and accompanying drawing comprehend only the general and preferred embodiment of my invention and that various changes in details of construction, proportion and arrangement of parts may be made within the scope of the appended claim without sacrificing any of the advantages of the invention.

The invention described herein may be manufactured and used by or for the Government of the United States of America for governmental purposes without the payment of any royalties thereon or therefor.

What I claim is:

A viscosimeter, including a body provided with anv arcuatebore therein, said bore being open to atmosphere at both ends and adapted to contain a quiescent material, a restricted passageway leading from the inner periphery of the bore to the atmosphere, a pendulum pivotally mounted on the body and operable in the passageway, a streamline bob carried by the pendulum and operable in the bore, means including a push-pull rod for holding said bob against premature movement, means on the bob in which said holding means engages, an indicator carried by the pendulum, and a scale over which the indicator sweeps. I

HOWARD C. RULE, JR. 

